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stream_encoder : Remove un-needed conversion from __m128i to FLAC__uint64.

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Encoding speed slightly increased (1...2% for FLAC -8).

Patch-from: lvqcl <lvqcl.mail@gmail.com>
This commit is contained in:
Erik de Castro Lopo
2014-01-31 20:39:26 +11:00
parent 4618512de2
commit 59cfca0030
2 changed files with 52 additions and 68 deletions
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56
src/libFLAC/stream_encoder_intrin_ssse3.c
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@@ -59,11 +59,9 @@ void FLAC__precompute_partition_info_sums_intrin_ssse3(const FLAC__int32 residua
__m128i mm_res, mm_sum;
if(bps <= 16) {
FLAC__uint32 abs_residual_partition_sum;
for(partition = residual_sample = 0; partition < partitions; partition++) {
end += default_partition_samples;
abs_residual_partition_sum = 0;
mm_sum = _mm_setzero_si128();
e1 = (residual_sample + 3) & ~3; e3 = end & ~3;
@@ -71,69 +69,59 @@ void FLAC__precompute_partition_info_sums_intrin_ssse3(const FLAC__int32 residua
e1 = end; /* try flac -l 1 -b 16 and you'll be here */
/* assumption: residual[] is properly aligned so (residual + e1) is properly aligned too and _mm_loadu_si128() is fast */
for( ; residual_sample < e1; residual_sample++)
abs_residual_partition_sum += abs(residual[residual_sample]); /* abs(INT_MIN) is undefined, but if the residual is INT_MIN we have bigger problems */
for( ; residual_sample < e1; residual_sample++) {
mm_res = _mm_cvtsi32_si128(residual[residual_sample]);
mm_res = _mm_abs_epi32(mm_res); /* abs(INT_MIN) is undefined, but if the residual is INT_MIN we have bigger problems */
mm_sum = _mm_add_epi32(mm_sum, mm_res);
}
for( ; residual_sample < e3; residual_sample+=4) {
mm_res = _mm_loadu_si128((const __m128i*)(residual+residual_sample));
mm_res = _mm_abs_epi32(mm_res);
mm_sum = _mm_add_epi32(mm_sum, mm_res);
}
for( ; residual_sample < end; residual_sample++) {
mm_res = _mm_cvtsi32_si128(residual[residual_sample]);
mm_res = _mm_abs_epi32(mm_res);
mm_sum = _mm_add_epi32(mm_sum, mm_res);
}
mm_sum = _mm_hadd_epi32(mm_sum, mm_sum);
mm_sum = _mm_hadd_epi32(mm_sum, mm_sum);
abs_residual_partition_sum += _mm_cvtsi128_si32(mm_sum);
for( ; residual_sample < end; residual_sample++)
abs_residual_partition_sum += abs(residual[residual_sample]);
abs_residual_partition_sums[partition] = abs_residual_partition_sum;
abs_residual_partition_sums[partition] = _mm_cvtsi128_si32(mm_sum);
}
}
else { /* have to pessimistically use 64 bits for accumulator */
FLAC__uint64 abs_residual_partition_sum;
for(partition = residual_sample = 0; partition < partitions; partition++) {
end += default_partition_samples;
abs_residual_partition_sum = 0;
mm_sum = _mm_setzero_si128();
e1 = (residual_sample + 1) & ~1; e3 = end & ~1;
FLAC__ASSERT(e1 <= end);
for( ; residual_sample < e1; residual_sample++)
abs_residual_partition_sum += abs(residual[residual_sample]);
for( ; residual_sample < e1; residual_sample++) {
mm_res = _mm_cvtsi32_si128(residual[residual_sample]); /* 0 0 0 r0 */
mm_res = _mm_abs_epi32(mm_res); /* 0 0 0 |r0| == 00 |r0_64| */
mm_sum = _mm_add_epi64(mm_sum, mm_res);
}
for( ; residual_sample < e3; residual_sample+=2) {
mm_res = _mm_loadl_epi64((const __m128i*)(residual+residual_sample)); /* 0 0 r1 r0 */
mm_res = _mm_abs_epi32(mm_res); /* 0 0 |r1| |r0| */
mm_res = _mm_shuffle_epi32(mm_res, _MM_SHUFFLE(3,1,2,0)); /* 0 |r1| 0 |r0| == |r1_64| |r0_64| */
mm_sum = _mm_add_epi64(mm_sum, mm_res);
}
mm_sum = _mm_add_epi64(mm_sum, _mm_srli_si128(mm_sum, 8));
#ifdef FLAC__CPU_IA32
#if defined _MSC_VER || defined __INTEL_COMPILER
abs_residual_partition_sum += mm_sum.m128i_u64[0];
#else
{
FLAC__uint64 tmp[2];
_mm_storel_epi64((__m128i *)tmp, mm_sum);
abs_residual_partition_sum += tmp[0];
for( ; residual_sample < end; residual_sample++) {
mm_res = _mm_cvtsi32_si128(residual[residual_sample]);
mm_res = _mm_abs_epi32(mm_res);
mm_sum = _mm_add_epi64(mm_sum, mm_res);
}
#endif
#else
abs_residual_partition_sum += _mm_cvtsi128_si64(mm_sum);
#endif
for( ; residual_sample < end; residual_sample++)
abs_residual_partition_sum += abs(residual[residual_sample]);
abs_residual_partition_sums[partition] = abs_residual_partition_sum;
mm_sum = _mm_add_epi64(mm_sum, _mm_srli_si128(mm_sum, 8));
_mm_storel_epi64((__m128i*)(abs_residual_partition_sums+partition), mm_sum);
}
}
}